5.5. USB Interface
FM101-NA-20 module supports USB 3.0 (5 Gb/s) ultra-high-speed data transmission, and
is also compatible with USB high-speed (480 Mb/s) for download, debugging, data
transmission and other functions.
USB pin definition is shown in the following table.
Table 20. USB pin definition
Pin Name
I/O
Pin Number
Description
USB_DP
AIO
7
USB 2.0 differential data signal (+)
USB_DM
AIO
9
USB 2.0 differential data signal (–)
USB_SS_TX_M
AO
29
USB 3.0 differential transmitting signal (–)
USB_SS_TX_P
AO
31
USB 3.0 differential transmitting signal (+)
USB_SS_RX_M
AI
35
USB 3.0 differential receiving signal (–)
USB_SS_RX_P
AI
37
USB 3.0 differential receiving signal (+)
5.5.1. USB Interface Circuit
The USB interface reference circuit is shown in the following figure.
5. Functional Interface
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